Fuel pump always on
#1
Dude......
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Fuel pump always on
My fuel pump won't stop running. I jumpered the pump test connector under the hood, then took it out after my troubleshooting. The pump still runs with the key in the on position and the car not running even without the the connector jumpered. Is there something that needs to be done to reset it?
#4
Respecognize!
do you dont want your car to run either?
the pump runs when the ket is in the "on" position because it has to prime the fuel system to get the car to start. My talon does that, my friends blazer does that. etc.
the pump runs when the ket is in the "on" position because it has to prime the fuel system to get the car to start. My talon does that, my friends blazer does that. etc.
#5
HAILERS
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Originally Posted by Low Impedance
do you dont want your car to run either?
the pump runs when the ket is in the "on" position because it has to prime the fuel system to get the car to start. My talon does that, my friends blazer does that. etc.
the pump runs when the ket is in the "on" position because it has to prime the fuel system to get the car to start. My talon does that, my friends blazer does that. etc.
No. Please stop writing that . There is no PRIIME by going to ON. Stop it, please.Your misleading people.
The only thing that comes close to Prime, is when the key is HELD to START. When you do that you energize the Circuit Opening Relay which in turn powers the fuel pump.
Going to ON does NOT make the pump run for even a moment.
#6
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Originally Posted by Valdez
My fuel pump won't stop running. I jumpered the pump test connector under the hood, then took it out after my troubleshooting. The pump still runs with the key in the on position and the car not running even without the the connector jumpered. Is there something that needs to be done to reset it?
That switch in the AFM does the same thing you do with the fuel pump check connector. When it *makes*, it puts a gnd on the Circuit Opening Relay which will pull in IF the key is to ON or better. When you jumper the Fuel pump check connector you just put a gnd on this same circuit.
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Originally Posted by HAILERS
Two possibilities come to mind. One is that the contacts in the Circuit Opening Relay are stuck together. Number two is the switch in the AFM. When the VANE is all the way fwd, the switch inside the AFM should not be made. If the switch is made with the vane all the way fwd, then something is amiss with the AFM. You can check to see if that switch is made by getting a volt/ohm meter out and checking the contacts on the AFM per the FSM.
That switch in the AFM does the same thing you do with the fuel pump check connector. When it *makes*, it puts a gnd on the Circuit Opening Relay which will pull in IF the key is to ON or better. When you jumper the Fuel pump check connector you just put a gnd on this same circuit.
That switch in the AFM does the same thing you do with the fuel pump check connector. When it *makes*, it puts a gnd on the Circuit Opening Relay which will pull in IF the key is to ON or better. When you jumper the Fuel pump check connector you just put a gnd on this same circuit.
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#8
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Originally Posted by Low Impedance
the pump runs when the ket is in the "on" position because it has to prime the fuel system to get the car to start.
#9
Rotaries confuse me
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Even if the fuel lines were drained, it wouldn't affect starting much without "priming" them. I have a fuel cut off switch that I use sometimes when shutting down the car (rev to 3k, turn the switch to off, and wait for it to die). Although I don't exactly drain the lines, I'm assuming it does take a lot of fuel out of them (still enough to start the car momentarily if I don't turn the switch on).
However, there have been times, such as after working on my fuel system, where it basically is drained. I crank it over, flip the switch on for a split second then off (just enough to get fuel in the system) and it will turn over. Once it fires up, I turn the switch on again to have the fuel pump run. So... basically, there's no need to prime the system.
Unless I'm wrong about how much fuel is left in my lines after taking off the fuel hoses in the engine bay. But, I can't see much more than whats left in the underbody hoses/lines.
However, there have been times, such as after working on my fuel system, where it basically is drained. I crank it over, flip the switch on for a split second then off (just enough to get fuel in the system) and it will turn over. Once it fires up, I turn the switch on again to have the fuel pump run. So... basically, there's no need to prime the system.
Unless I'm wrong about how much fuel is left in my lines after taking off the fuel hoses in the engine bay. But, I can't see much more than whats left in the underbody hoses/lines.
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